Import uuidutils unit tests from oslo

uuidutils is going to be removed from oslo, so we need to remove the
calls from our Ironic code. For reference, see
http://lists.openstack.org/pipermail/openstack-dev/2013-November/018980.html

This change imports the unit tests from Oslo for both
generate_uuid and is_uuid_like, which have been ported to ironic.common.

Closes-Bug: #1253497
Change-Id: I14ed5864615d798f5658d53be28af6bd5e86fc43
Bump required version of sqlalchemy-migrate

Bump required version of sqlalchemy-migrate

Change-Id: I4b5dc08c416f1a8055b1510d59fce4711d50e5b5
Merge "Bump required version of sqlalchemy-migrate"
Merge "Import uuidutils unit tests from oslo"